Latitude & Longitude (WGS84):
41° 21' 38'' North , 118° 18' 53'' West
Latitude & Longitude (decimal):
Long-form identifier:
mindat:1:2:59635:1
Other/historical names associated with this locality:
Last Chance; NBMG Sample Site 2435
A Hg mine located in sec. 7, T40N, R33E, MDM.
Structure: Major N-Trending, Steeply Dipping Faults ; Reg.Trends: Nne Local Shearing Along Dike Contacts; 2 Sets Of Fractures Filled With Fe-Oxides.
Alteration: Argillization Of Tuffs, Sandstones, Gravels
Tectonics: Basin And Range
Deposit: The white peak claims, together with the red ore claims, were the first to be staked in the district. They were discovered by james and arnold scossa in 1936. The fulton quicksilver co. Developed a 112-ft shaft and some drifts in 1937, and installed a 20-ton rotary furnace, but treated no ore. In 1938. Some ore was treated by the scossa brothers. In 1940, the white peaks mining co. Produced 263 flasks, and in 1942 j.o. Greenan struck rich ore in the footwall of a dike and recovered 343 flasks. The property was idle in mid-1943. In late 1954, the property was leased to j. Etchart, who began to dewater the shaft. Workings consist of a 165-ft. Vertical shaft with levels at 62, 112, and 165 ft, with underground workings totalling 650 ft. In length. ; info.src : 1 pub lit; 3 field observ ore deposition occurs in diabase dike and in wall rock above 112 ft level
Deposit type: Hot-spring Hg
Development: 10 TON ROTARY (1943)
Geology: Dike averages 20 feet wide. Ore zone along footwall of dike was widest and richest small amounts of cinnabar occur As irregular veinlets in the rhyolite overlying the dike. ; geol.desc: diabase dike cuts perm - tri argillized tuffs, sandstones, and fine gravels. Rhyolite is post dike
Rock formation(s): Rhyolite (Extrusive);Diabase Dike
Sedimentary Rocks
Ore(s): 3 Sets Of Cinnabar-Bearing Fractures In Dike
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This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
3 valid minerals.
Rock Types Recorded
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Entries shown in red are rocks recorded for this region.
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List of minerals arranged by Strunz 10th Edition classification
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References
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.
doi:10.2138/am-2024-9486.
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